Baby Name Poll

Brielle Cecelia vs. Something Else
Baby is due any day now.
We have two girls already,
Averie Florence (almost 4) & Isadora Marjorie (14 months).
We have never struggled this much with a baby name... Brielle is the only name I like but I feel like nothing sounds good in that middle spot? IMO Brielle sounds best as a middle name but I cannot imagine calling baby anything else.
Our last name is 1 syllable and starts with an S.